CN105013057A - Positive end-expiratory pressure control system and method - Google Patents
Positive end-expiratory pressure control system and method Download PDFInfo
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- CN105013057A CN105013057A CN201510448427.2A CN201510448427A CN105013057A CN 105013057 A CN105013057 A CN 105013057A CN 201510448427 A CN201510448427 A CN 201510448427A CN 105013057 A CN105013057 A CN 105013057A
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- peep
- pressure
- electromagnetic valve
- air bleeding
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- 238000000034 method Methods 0.000 title claims description 21
- 244000144985 peep Species 0.000 claims abstract description 156
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 6
- 230000000740 bleeding effect Effects 0.000 claims description 46
- 230000000241 respiratory effect Effects 0.000 claims description 9
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 abstract 3
- 230000006837 decompression Effects 0.000 abstract 1
- 238000013022 venting Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 39
- 230000001276 controlling effect Effects 0.000 description 7
- 230000005284 excitation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 206010003694 Atrophy Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 208000031816 Pathologic Dilatation Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000037444 atrophy Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Abstract
The invention discloses a positive end-expiratory pressure control system, and the system comprises a PEEP valve which is connected with a patient breathing tube; and a pressure sensor, a bypass of which is connected to connection ends of the PEEP valve and the patient breathing tube. The PEEP pneumatic control assembly comprises a solenoid valve, a vent valve, a proportional valve, and a pressure stabilizing valve, wherein one end of the solenoid valve is connected with an air supply port air circuit, and the other end of the solenoid valve is connected with a vent valve air circuit. The other end of the vent valve is connected with a PEEP valve air circuit, and the vent valve is provided with a large drift diameter exhaust port which is communicated with the atmosphere. One end of the proportional valve is connected with the air supply port air circuit, and the other end of the proportional valve is connected with the PEEP valve and the vent valve air circuit. One end of the pressure stabilizing valve is connected to an air circuit between the proportional valve and the PEEP valve, and the other end of the pressure stabilizing valve is connected with the atmosphere. The system also comprises a control unit which adjusts the PEEP pressure to be different values. The system can achieve quick venting and decompression through the large drift diameter exhaust port, is high in safety factor, enables PEEP pressure control to be accurate, is quick in response, and is high in stability.
Description
Technical field
The present invention relates to medical electronics technical field, particularly relate to a kind of end expiratory positive pressure control system and method.
Background technology
PEEP and end expiratory positive pressure, when end-tidal airway open, airway pressure is still kept above atmospheric pressure, subside to prevent alveolar collapse, the alveolar ectasia that atrophy can be made to subside and the alveolar do not opened are opened again, thus can increase the compliance of functional residual capacity and lung, are conducive to oxygen diffusion.When PEEP increases extremely, patient expiration does work to be increased and causes expiratory dyspnea, may cause the danger suffocated.Along with the development of medical skill, to the control accuracy of PEEP, response speed, security performance is had higher requirement.
At present, the PEEP control mode of Use of respirator mainly contains three kinds: mechanical type end expiratory positive pressure control mode, excitation electromotor or excitation electricity circle control mode and pneumatic control mode.The built-in regulating spring of mechanical type end expiratory positive pressure control mode PEEP valve, complicated in mechanical structure and bulky, the elastic force precision of spring is poor, not can accurately control PEEP pressure and PEEP pressure cannot continuously adjustabe, safety coefficient is not enough, air consumption is large, and mechanical PEEP valve needs manual adjustments, complex operation.Excitation electromotor or excitation electricity circle control mode use excitation electromotor to control, and excitation electromotor volume is large, and make product Design of Mechanical Structure complicated, secondly excitation electromotor response speed is slow, and can not respond the change of PEEP pressure fast, safety coefficient is low and expensive.Existing pneumatic PEEP control mode pressure relief capability is more weak, pressure release speed slow, PEEP pressure-responsive speed is slow.
Summary of the invention
The invention provides a kind of end expiratory positive pressure control system and method, make PEEP Stress control accurately, response fast, stability is high, safety coefficient is higher, and cost is lower.
The present invention is by the following technical solutions:
First aspect, the invention provides a kind of end expiratory positive pressure control system, comprising:
PEEP valve, is connected with patient respiratory pipeline, for generation of default PEEP pressure;
Pressure transducer, bypass is connected to the linkage section between described PEEP valve and described patient respiratory pipeline;
PEEP pneumatic control assembly, its input port is connected with air supply opening, and its delivery outlet is connected with described PEEP valve; Described PEEP pneumatic control assembly comprises electromagnetic valve, air bleeding valve, proportioning valve and pressure maintaining valve, and described electromagnetic valve one end is connected with described air supply opening gas circuit, and its other end is connected with one end gas circuit of described air bleeding valve; The other end of described air bleeding valve is connected with described PEEP valve gas circuit, and described air bleeding valve is provided with the air vent be communicated with air; One end of described proportioning valve is connected with described air supply opening gas circuit, and its other end is connected with described PEEP valve and air bleeding valve gas circuit respectively; One end bypass of described pressure maintaining valve is connected to the gas circuit between described proportioning valve and described PEEP valve, and its other end is communicated with air;
Control unit, is electrically connected with described electromagnetic valve, proportioning valve and pressure transducer respectively, for obtaining the PEEP pressure that described pressure transducer gathers, the signal of telecommunication of Controlling solenoid valve and proportioning valve, regulates PEEP pressure to be different value.
Further, also choke valve is provided with between the input port and described air supply opening of described PEEP pneumatic control assembly, described choke valve one end is connected with the air relief valve gas circuit of described air supply opening, its other end is connected with described electromagnetic valve and described proportioning valve gas circuit respectively, for controlling the maximum stream flow of the control gas exporting described PEEP valve to.
Second aspect, the present invention also provides a kind of end expiratory positive pressure control method adopting end expiratory positive pressure control system described above, following steps:
S101, send the signal of telecommunication to described electromagnetic valve described electromagnetic valve is opened, control gas and input after described air bleeding valve through described electromagnetic valve and closes air bleeding valve, send the signal of telecommunication to proportioning valve and open proportioning valve;
S102, obtain current PE EP pressure by pressure transducer;
S103, judge described PEEP pressure whether within normal range, if described PEEP pressure is within normal range, enter step S104; If described PEEP pressure, not within normal range, enters step S106;
S104, judge whether to need to regulate described PEEP pressure, if do not need to regulate described PEEP pressure, return step S102; If need to regulate described PEEP pressure, enter step S105;
The size of S105, control ratio valve electric current controls to adjust the flow that gas exports described proportioning valve, returns step S102;
S106, judge whether described PEEP pressure is greater than default PEEP pressure security value, if described PEEP pressure is greater than default PEEP pressure security value, enter step S107; If described PEEP pressure is not more than default PEEP pressure security value, return step S104;
S107, turn off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, PEEP controls the control gas moment aerofluxus in gas circuit, by described PEEP Pressure Drop to presetting PEEP pressure security value, reports to the police.
Further, before described step S101, also comprise:
S100, judge that the current generation is in expiratory phase or is in expiration phase;
If S108 is in expiration phase, turns off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, detect PEEP pressure and be less than default PEEP pressure, continue Preset Time, enter step S101;
If S109 is in expiratory phase, the signal of telecommunication sent to described electromagnetic valve makes electromagnetic valve open, control to close air bleeding valve after gas inputs described air bleeding valve by described electromagnetic valve, send the signal of telecommunication to proportioning valve and open proportioning valve, current PE EP pressure is obtained by pressure transducer, adjustment PEEP pressure is the preset multiple of PAP last time, breathing machine ventilation.
Technical scheme provided by the invention brings following beneficial effect:
When PEEP pressure is greater than default PEEP pressure security value, control unit sends signal of telecommunication instruction to electromagnetic valve, closed electromagnetic valve, air bleeding valve is opened, and PEEP controls the control gas moment aerofluxus in gas circuit, by PEEP Pressure Drop to presetting PEEP pressure security value, ensure patient safety, big orifice air bleeding valve can be exhausted fast, fast pressure release, ensure the safety of patient, safety coefficient is high simultaneously; Pressure maintaining valve can stablize PEEP pressure fast, and proportioning valve is control PEEP pressure and the quick change responding PEEP pressure accurately, and stability is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the present invention, below the accompanying drawing used required in describing the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to content of the present invention and these accompanying drawings.
Fig. 1 is the structural representation of end expiratory positive pressure control system provided by the invention.
Fig. 2 is end expiratory positive pressure control circuit block diagram provided by the invention.
Fig. 3 is the method flow diagram of first embodiment of the end expiratory positive pressure control method of end expiratory positive pressure control system shown in employing Fig. 1 provided by the invention.
Fig. 4 is the method flow diagram of second embodiment of the end expiratory positive pressure control method of end expiratory positive pressure control system shown in employing Fig. 1 provided by the invention.
Detailed description of the invention
The technical problem solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the structural representation of end expiratory positive pressure control system provided by the invention.Fig. 2 is end expiratory positive pressure control circuit block diagram provided by the invention.Shown in figure 1, Fig. 2, this end expiratory positive pressure control system, comprises PEEP valve 10, pressure transducer 20, PEEP pneumatic control assembly 30 and control unit 40, PEEP valve 10 and is connected with patient respiratory pipeline, patient respiratory face shield is connected with patient respiratory pipeline, for generation of default PEEP pressure; Pressure transducer 20 bypass is connected to the linkage section between described PEEP valve 10 and described patient respiratory pipeline, for obtaining current PE EP pressure; PEEP pneumatic control assembly 30 input port is connected with air supply opening 50, and its delivery outlet is connected with described PEEP valve 10;
Described PEEP pneumatic control assembly 30 comprises electromagnetic valve 300, air bleeding valve 301, proportioning valve 302 and pressure maintaining valve 303, described electromagnetic valve 300 one end is connected with described air supply opening 50 gas circuit, its other end is connected with one end gas circuit of described air bleeding valve 301, and the open and close of described electromagnetic valve control the pass of described air bleeding valve, open; The other end of described air bleeding valve 301 is connected with described PEEP valve 10 gas circuit, and described air bleeding valve 301 is provided with the big orifice air vent be communicated with air, realizes quick pressure releasing for the gas of discharging fast in gas circuit; One end of described proportioning valve 302 is connected with described air supply opening 50 gas circuit, and its other end is connected with described PEEP valve 10 and air bleeding valve 301 gas circuit respectively, for quick adjustment PEEP pressure to presetting PEEP pressure; One end bypass of described pressure maintaining valve 303 is connected to the gas circuit between described proportioning valve 302 and described PEEP valve 10, and its other end is communicated with air, obtains stable PEEP pressure for coordinating described proportioning valve 302; Control unit 40, is electrically connected with described electromagnetic valve 300, proportioning valve 302 and pressure transducer 20 respectively, for obtaining the PEEP pressure that described pressure transducer 20 gathers, the signal of telecommunication of Controlling solenoid valve 300 and proportioning valve 302, regulates PEEP pressure to be different value.In the present embodiment, air bleeding valve 301 is preferably big orifice air bleeding valve 301, and latus rectum is greater than 5mm.
The operation principle of this end expiratory positive pressure control system is: control unit 40 gathers current PE EP pressure by pressure transducer 20, control unit 40 carries out discriminatory analysis according to the PEEP pressure gathered, send the signal of telecommunication respectively and be given to electromagnetic valve 300 and proportioning valve 302, control unit 40 sends to the signal of telecommunication of electromagnetic valve 300 that electromagnetic valve 300 is opened, control gas input air bleeding valve 301 is closed air bleeding valve 301, when PEEP pressure is within normal range, electromagnetic valve 300 is in open mode, and air bleeding valve 301 is in closed condition; The flow that control unit 40 sends to the signal of telecommunication of proportioning valve 302 to make proportioning valve 302 open adjustment control gas exports, pressure transducer 20 Real-time Collection current PE EP pressure, when PEEP pressure reaches default PEEP pressure, the flow that proportioning valve 302 stops adjustment controlling gas exports, and obtains stable PEEP pressure.The PEEP pressure collected when pressure transducer 20 is excessive, and when exceeding default PEEP pressure security value, control unit 40 sends the signal of telecommunication carries out controlling gas flow adjustment to proportioning valve 302, reduces PEEP pressure and makes it lower than default PEEP pressure security value; After adjusting through proportioning valve 302, PEEP pressure is still higher than default PEEP pressure security value, control unit 40 sends signal of telecommunication instruction to electromagnetic valve 300, electromagnetic valve 300 cuts out, air bleeding valve 301 is opened, PEEP controls the control gas moment aerofluxus in gas circuit, by described PEEP Pressure Drop to benchmark PEEP pressure, reports to the police.Big orifice air bleeding valve 301 in this end expiratory positive pressure control system PEEP pneumatic control assembly 30 can be exhausted fast, pressure release fast, and ensure the safety of patient, safety coefficient is high simultaneously; Pressure maintaining valve 303 can stablize PEEP pressure fast, and proportioning valve 302 is control PEEP pressure and the quick change responding PEEP pressure accurately, and stability is high.
Preferably, choke valve 60 is also provided with between the input port and described air supply opening 50 of described PEEP pneumatic control assembly 30, described choke valve 60 one end is connected with the air relief valve (not shown) gas circuit of described air supply opening 50, its other end is connected with described electromagnetic valve 300 and described proportioning valve 302 gas circuit respectively, for controlling the maximum stream flow of the control gas exporting described PEEP valve 10 to.Control by choke valve 60 maximum stream flow exporting the control gas of described PEEP valve to, the maximum of control PEEP pressure, ensure the safety of patient, improve safety coefficient.
Fig. 3 is the method flow diagram of first embodiment of the end expiratory positive pressure control method of end expiratory positive pressure control system shown in employing Fig. 1 provided by the invention.The end expiratory positive pressure control method of end expiratory positive pressure control system shown in this employing Fig. 1, comprises the following steps:
S101, to electromagnetic valve send the signal of telecommunication electromagnetic valve is opened, control gas through electromagnetic valve input air bleeding valve after close air bleeding valve, to proportioning valve send the signal of telecommunication open proportioning valve.
S102, obtain current PE EP pressure by pressure transducer.
S103, judge described PEEP pressure whether within normal range, if described PEEP pressure is within normal range, enter step S104; If described PEEP pressure, not within normal range, enters step S106.
S104, judge whether to need to regulate described PEEP pressure, if do not need to regulate described PEEP pressure, return step S102; If need to regulate described PEEP pressure, enter step S105.
Because default PEEP pressure belongs to PEEP pressure normal range, after judging that described PEEP pressure is within normal range, also need to judge whether described PEEP pressure is that default PEEP pressure is to determine the need of the described PEEP pressure of adjustment again.
The size of S105, control ratio valve electric current, to adjust the flow controlling gas export ratio valve, returns step S102.
S106, judge whether described PEEP pressure is greater than default PEEP pressure security value, if described PEEP pressure is greater than default PEEP pressure security value, enter step S107; If described PEEP pressure is not more than default PEEP pressure security value, return step S104.
S107, turn off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, PEEP controls the control gas moment aerofluxus in gas circuit, by described PEEP Pressure Drop to presetting PEEP pressure security value, reports to the police.
In the present embodiment, air bleeding valve is preferably big orifice air bleeding valve, and latus rectum is greater than 5mm.
To sum up, end expiratory positive pressure control method provided by the invention adopts big orifice air bleeding valve to be exhausted fast, pressure release fast, and ensure the safety of patient, safety coefficient is high simultaneously; Pressure maintaining valve can stablize PEEP pressure fast, and proportioning valve is control PEEP pressure and the quick change responding PEEP pressure accurately, and stability is high.
Fig. 4 is the method flow diagram of second embodiment of end expiratory positive pressure control method provided by the invention.The difference of method shown in the present embodiment and Fig. 3 is, before described step S101, also comprises:
S100, judge that the current generation is in expiratory phase or is in expiration phase.
If S108 is in expiration phase, turns off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, detect PEEP pressure and be less than default PEEP pressure, continue Preset Time, enter step S101.
Particularly, Preset Time is preferably 100ms.
If S109 is in expiratory phase, the signal of telecommunication sent to described electromagnetic valve makes electromagnetic valve open, control to close air bleeding valve after gas inputs described air bleeding valve by described electromagnetic valve, send the signal of telecommunication to proportioning valve and open proportioning valve, current PE EP pressure is obtained by pressure transducer, adjustment PEEP pressure is the preset multiple of PAP last time, breathing machine ventilation.
Particularly, preset multiple is preferably 1.5.
To sum up, end expiratory positive pressure control method provided by the invention judges expiratory phase and respiration phase, and enable this PEEP control method be applied to various respiratory pattern, be widely used, practicality is high.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (4)
1. an end expiratory positive pressure control system, is characterized in that, comprising:
PEEP valve, is connected with patient respiratory pipeline, for generation of default PEEP pressure;
Pressure transducer, bypass is connected to the linkage section between described PEEP valve and described patient respiratory pipeline;
PEEP pneumatic control assembly, its input port is connected with air supply opening, and its delivery outlet is connected with described PEEP valve; Described PEEP pneumatic control assembly comprises electromagnetic valve, air bleeding valve, proportioning valve and pressure maintaining valve, and described electromagnetic valve one end is connected with described air supply opening gas circuit, and its other end is connected with one end gas circuit of described air bleeding valve; The other end of described air bleeding valve is connected with described PEEP valve gas circuit, and described air bleeding valve is provided with the air vent be communicated with air; One end of described proportioning valve is connected with described air supply opening gas circuit, and its other end is connected with described PEEP valve and air bleeding valve gas circuit respectively; One end bypass of described pressure maintaining valve is connected to the gas circuit between described proportioning valve and described PEEP valve, and its other end is communicated with air;
Control unit, is electrically connected with described electromagnetic valve, proportioning valve and pressure transducer respectively, for obtaining the PEEP pressure that described pressure transducer gathers, the signal of telecommunication of Controlling solenoid valve and proportioning valve, regulates PEEP pressure to be different value.
2. end expiratory positive pressure control system according to claim 1, it is characterized in that, also choke valve is provided with between the input port and described air supply opening of described PEEP pneumatic control assembly, described choke valve one end is connected with the air relief valve gas circuit of described air supply opening, its other end is connected with described electromagnetic valve and described proportioning valve gas circuit respectively, for controlling the maximum stream flow of the control gas exporting described PEEP valve to.
3. adopt an end expiratory positive pressure control method for end expiratory positive pressure control system as claimed in claim 1 or 2, it is characterized in that, comprise the following steps:
S101, send the signal of telecommunication to described electromagnetic valve described electromagnetic valve is opened, control gas and input after described air bleeding valve through described electromagnetic valve and closes air bleeding valve, send the signal of telecommunication to proportioning valve and open proportioning valve;
S102, obtain current PE EP pressure by pressure transducer;
S103, judge described PEEP pressure whether within normal range, if described PEEP pressure is within normal range, enter step S104; If described PEEP pressure, not within normal range, enters step S106;
S104, judge whether to need to regulate described PEEP pressure, if do not need to regulate described PEEP pressure, return step S102; If need to regulate described PEEP pressure, enter step S105;
The size of S105, control ratio valve electric current controls to adjust the flow that gas exports described proportioning valve, returns step S102;
S106, judge whether described PEEP pressure is greater than default PEEP pressure security value, if described PEEP pressure is greater than default PEEP pressure security value, enter step S107; If described PEEP pressure is not more than default PEEP pressure security value, return step S104;
S107, turn off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, PEEP controls the control gas moment aerofluxus in gas circuit, by described PEEP Pressure Drop to presetting PEEP pressure security value, reports to the police.
4. method according to claim 3, is characterized in that, before described step S101, also comprises:
S100, judge that the current generation is in expiratory phase or is in expiration phase;
If S108 is in expiration phase, turns off the signal of telecommunication sent to described electromagnetic valve and make closed electromagnetic valve, open air bleeding valve, detect PEEP pressure and be less than default PEEP pressure, continue Preset Time, enter step S101;
If S109 is in expiratory phase, the signal of telecommunication sent to described electromagnetic valve makes electromagnetic valve open, control to close air bleeding valve after gas inputs described air bleeding valve by described electromagnetic valve, send the signal of telecommunication to proportioning valve and open proportioning valve, current PE EP pressure is obtained by pressure transducer, adjustment PEEP pressure is the preset multiple of PAP last time, breathing machine ventilation.
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| CN201510448427.2A CN105013057B (en) | 2015-07-28 | 2015-07-28 | A kind of end-expiratory positive pressure control system and method |
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| CN201510448427.2A CN105013057B (en) | 2015-07-28 | 2015-07-28 | A kind of end-expiratory positive pressure control system and method |
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| CN110051454A (en) * | 2019-05-28 | 2019-07-26 | 深圳市瑞沃德生命科技有限公司 | The ventilation control method of ventilator |
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| CN105013057B (en) | 2018-05-04 |
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